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[80.71.134.83]) by smtp.gmail.com with ESMTPSA id z21-20020aa7d415000000b0043566884333sm1452538edq.63.2022.06.17.16.56.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jun 2022 16:56:15 -0700 (PDT) From: Ricardo Ribalda To: Laurent Pinchart , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, tfiga@chromium.org, senozhatsky@chromium.org, yunkec@google.com Cc: Ricardo Ribalda Subject: [PATCH v8 4/9] media: uvcvideo: Use standard names for menus Date: Sat, 18 Jun 2022 01:56:05 +0200 Message-Id: <20220617235610.321917-5-ribalda@chromium.org> X-Mailer: git-send-email 2.37.0.rc0.104.g0611611a94-goog In-Reply-To: <20220617235610.321917-1-ribalda@chromium.org> References: <20220617235610.321917-1-ribalda@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Instead of duplicating the menu info, use the one from the core. Also, do not use extra memory for 1:1 mappings. Signed-off-by: Ricardo Ribalda Suggested-by: Laurent Pinchart --- drivers/media/usb/uvc/uvc_ctrl.c | 116 +++++++++++++++++++++---------- drivers/media/usb/uvc/uvc_v4l2.c | 80 ++++++++++++++++----- drivers/media/usb/uvc/uvcvideo.h | 3 +- include/uapi/linux/uvcvideo.h | 3 +- 4 files changed, 144 insertions(+), 58 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index a03714c3a265..1a3021a16b76 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -362,19 +362,31 @@ static const u32 uvc_control_classes[] = { V4L2_CID_USER_CLASS, }; -static const struct uvc_menu_info power_line_frequency_controls[] = { - { 0, "Disabled" }, - { 1, "50 Hz" }, - { 2, "60 Hz" }, - { 3, "Auto" }, -}; +static const int exposure_auto_mapping[] = { 2, 1, 4, 8 }; -static const struct uvc_menu_info exposure_auto_controls[] = { - { 2, "Auto Mode" }, - { 1, "Manual Mode" }, - { 4, "Shutter Priority Mode" }, - { 8, "Aperture Priority Mode" }, -}; +static u32 uvc_mapping_get_menu_value(struct uvc_control_mapping *mapping, + u32 idx) +{ + if (!test_bit(idx, &mapping->menu_mask)) + return 0; + + if (mapping->menu_mapping) + return mapping->menu_mapping[idx]; + + return idx; +} + +static const char +*uvc_mapping_get_menu_name(struct uvc_control_mapping *mapping, u32 idx) +{ + if (!test_bit(idx, &mapping->menu_mask)) + return NULL; + + if (mapping->menu_names) + return mapping->menu_names[idx]; + + return v4l2_ctrl_get_menu(mapping->id)[idx]; +} static s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, u8 query, const u8 *data) @@ -523,9 +535,9 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_BITMASK, - .menu_info = exposure_auto_controls, + .menu_mapping = exposure_auto_mapping, .menu_mask = - BIT_MASK(ARRAY_SIZE(exposure_auto_controls)), + GENMASK(ARRAY_SIZE(exposure_auto_mapping) - 1, 0), .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, }, }, { @@ -730,9 +742,8 @@ static const struct uvc_control_mapping uvc_ctrl_mappings_uvc11[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_ENUM, - .menu_info = power_line_frequency_controls, .menu_mask = - BIT_MASK(ARRAY_SIZE(power_line_frequency_controls) - 1), + GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0), }, }; @@ -745,9 +756,8 @@ static const struct uvc_control_mapping uvc_ctrl_mappings_uvc15[] = { .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_ENUM, - .menu_info = power_line_frequency_controls, .menu_mask = - BIT_MASK(ARRAY_SIZE(power_line_frequency_controls)), + GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0), }, }; @@ -970,13 +980,17 @@ static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping, s32 value = mapping->get(mapping, UVC_GET_CUR, data); if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { - const struct uvc_menu_info *menu = mapping->menu_info; unsigned int i; - for (i = 1; BIT(i) <= mapping->menu_mask; ++i, ++menu) { + for (i = 1; BIT(i) <= mapping->menu_mask; ++i) { + u32 menu_value; + if (!test_bit(i, &mapping->menu_mask)) continue; - if (menu->value == value) { + + menu_value = uvc_mapping_get_menu_value(mapping, i); + + if (menu_value == value) { value = i; break; } @@ -1108,7 +1122,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, { struct uvc_control_mapping *master_map = NULL; struct uvc_control *master_ctrl = NULL; - const struct uvc_menu_info *menu; unsigned int i; memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl)); @@ -1153,11 +1166,15 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, v4l2_ctrl->maximum = fls(mapping->menu_mask) - 1; v4l2_ctrl->step = 1; - menu = mapping->menu_info; - for (i = 1; BIT(i) <= mapping->menu_mask; ++i, ++menu) { + for (i = 1; BIT(i) <= mapping->menu_mask; ++i) { + u32 menu_value; + if (!test_bit(i, &mapping->menu_mask)) continue; - if (menu->value == v4l2_ctrl->default_value) { + + menu_value = uvc_mapping_get_menu_value(mapping, i); + + if (menu_value == v4l2_ctrl->default_value) { v4l2_ctrl->default_value = i; break; } @@ -1250,11 +1267,11 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, int uvc_query_v4l2_menu(struct uvc_video_chain *chain, struct v4l2_querymenu *query_menu) { - const struct uvc_menu_info *menu_info; struct uvc_control_mapping *mapping; struct uvc_control *ctrl; u32 index = query_menu->index; u32 id = query_menu->id; + const char *name; int ret; memset(query_menu, 0, sizeof(*query_menu)); @@ -1276,11 +1293,10 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain, goto done; } - menu_info = &mapping->menu_info[query_menu->index]; - if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { s32 bitmap; + u32 menu_value; if (!ctrl->cached) { ret = uvc_ctrl_populate_cache(chain, ctrl); @@ -1288,15 +1304,22 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain, goto done; } + menu_value = uvc_mapping_get_menu_value(mapping, + query_menu->index); + bitmap = mapping->get(mapping, UVC_GET_RES, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); - if (!(bitmap & menu_info->value)) { + if (!(bitmap & menu_value)) { ret = -EINVAL; goto done; } } - strscpy(query_menu->name, menu_info->name, sizeof(query_menu->name)); + name = uvc_mapping_get_menu_name(mapping, query_menu->index); + if (name) + strscpy(query_menu->name, name, sizeof(query_menu->name)); + else + ret = -EINVAL; done: mutex_unlock(&chain->ctrl_mutex); @@ -1783,7 +1806,7 @@ int uvc_ctrl_set(struct uvc_fh *handle, if (!test_bit(xctrl->value, &mapping->menu_mask)) return -EINVAL; - value = mapping->menu_info[xctrl->value].value; + value = uvc_mapping_get_menu_value(mapping, xctrl->value); /* Valid menu indices are reported by the GET_RES request for * UVC controls that support it. @@ -2229,12 +2252,28 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain, INIT_LIST_HEAD(&map->ev_subs); - size = sizeof(*mapping->menu_info) * fls(mapping->menu_mask); - map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL); - if (map->menu_info == NULL) { - kfree(map->name); - kfree(map); - return -ENOMEM; + if (mapping->menu_mapping && mapping->menu_mask) { + size = sizeof(mapping->menu_mapping[0]) * + fls(mapping->menu_mask); + map->menu_mapping = kmemdup(mapping->menu_mapping, size, + GFP_KERNEL); + if (!map->menu_mapping) { + kfree(map->name); + kfree(map); + return -ENOMEM; + } + } + if (mapping->menu_names && mapping->menu_mask) { + size = sizeof(mapping->menu_names[0]) * + fls(mapping->menu_mask); + map->menu_names = kmemdup(mapping->menu_names, size, + GFP_KERNEL); + if (!map->menu_names) { + kfree(map->menu_mapping); + kfree(map->name); + kfree(map); + return -ENOMEM; + } } if (map->get == NULL) @@ -2577,7 +2616,8 @@ static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev, list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) { list_del(&mapping->list); - kfree(mapping->menu_info); + kfree(mapping->menu_names); + kfree(mapping->menu_mapping); kfree(mapping->name); kfree(mapping); } diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index 85aced173daa..0ba1eb92df8e 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -25,6 +25,64 @@ #include "uvcvideo.h" +static int uvc_control_xu_2_mapping(struct uvc_control_mapping *map, + struct uvc_xu_control_mapping *xmap) +{ + char (*names)[UVC_MENU_NAME_LEN]; + unsigned int i; + u32 *mapping; + size_t size; + + /* Prevent excessive memory consumption, as well as integer + * overflows. + */ + if (xmap->menu_count == 0 || + xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) + return -EINVAL; + + map->menu_mask = BIT_MASK(xmap->menu_count); + + size = xmap->menu_count * sizeof(*map->menu_mapping); + mapping = kzalloc(size, GFP_KERNEL); + if (!mapping) + return -ENOMEM; + + for (i = 0; i < xmap->menu_count ; i++) + if (copy_from_user(&mapping[i], &xmap->menu_info[i].value, + sizeof(mapping[i]))) { + kfree(mapping); + return -ENOMEM; + } + + map->menu_mapping = mapping; + + /* + * Always use the standard naming if available. + */ + if (v4l2_ctrl_get_menu(map->id)) + return 0; + + size = xmap->menu_count * sizeof(map->menu_names[0]); + names = kzalloc(size, GFP_KERNEL); + if (!names) { + kfree(mapping); + return -ENOMEM; + } + + for (i = 0; i < xmap->menu_count ; i++) { + /* sizeof(names[i]) - 1: to take care of \0 */ + if (copy_from_user(&names[i], &xmap->menu_info[i].name, + sizeof(names[i]) - 1)) { + kfree(names); + kfree(mapping); + return -ENOMEM; + } + } + map->menu_names = names; + + return 0; +} + /* ------------------------------------------------------------------------ * UVC ioctls */ @@ -32,7 +90,6 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, struct uvc_xu_control_mapping *xmap) { struct uvc_control_mapping *map; - unsigned int size; int ret; map = kzalloc(sizeof(*map), GFP_KERNEL); @@ -63,23 +120,9 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, break; case V4L2_CTRL_TYPE_MENU: - /* Prevent excessive memory consumption, as well as integer - * overflows. - */ - if (xmap->menu_count == 0 || - xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) { - ret = -EINVAL; - goto free_map; - } - - size = xmap->menu_count * sizeof(*map->menu_info); - map->menu_info = memdup_user(xmap->menu_info, size); - if (IS_ERR(map->menu_info)) { - ret = PTR_ERR(map->menu_info); + ret = uvc_control_xu_2_mapping(map, xmap); + if (ret) goto free_map; - } - - map->menu_mask = BIT_MASK(xmap->menu_count); break; default: @@ -91,7 +134,8 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, ret = uvc_ctrl_add_mapping(chain, map); - kfree(map->menu_info); + kfree(map->menu_names); + kfree(map->menu_mapping); free_map: kfree(map); diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 0736b8815d79..b702f1c8547b 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -253,7 +253,8 @@ struct uvc_control_mapping { enum v4l2_ctrl_type v4l2_type; u32 data_type; - const struct uvc_menu_info *menu_info; + const u32 *menu_mapping; + const char (*menu_names)[UVC_MENU_NAME_LEN]; unsigned long menu_mask; u32 master_id; diff --git a/include/uapi/linux/uvcvideo.h b/include/uapi/linux/uvcvideo.h index 8288137387c0..1b64b6aa40b5 100644 --- a/include/uapi/linux/uvcvideo.h +++ b/include/uapi/linux/uvcvideo.h @@ -36,9 +36,10 @@ UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | \ UVC_CTRL_FLAG_GET_DEF) +#define UVC_MENU_NAME_LEN 32 struct uvc_menu_info { __u32 value; - __u8 name[32]; + __u8 name[UVC_MENU_NAME_LEN]; }; struct uvc_xu_control_mapping {